Pixellize Image Optimizer is a fast, lightweight, and beginner-friendly WordPress plugin that automatically converts uploaded images into modern WebP format.
It ensures that your website loads faster by replacing original image URLs across your entire site — including post content, image tags, and responsive srcset.
⚡ No manual conversion. No complex setup. Just upload and optimize.
🔥 Key Features
✅ Automatic WebP conversion on image upload
✅ Bulk optimize images already in your library, with a live progress bar and background processing
✅ Optimize a single page’s images on demand from the admin toolbar
✅ Supports JPG, JPEG, PNG, BMP, and AVIF
✅ Skips images already in WebP format
✅ Smart fallback to Imagick if GD is unavailable
✅ Adjustable WebP quality (0–100, default: 85)
✅ Optional maximum image dimension to scale down large uploads before conversion
✅ Replace image URLs in:
- Attachment tags
- srcset (responsive images)
- Post/page content
✅ Keep originals and add WebP for every size, or replace and delete to save storage
✅ Restore a single image back to its original from the Media Library
✅ Keeps original file safe if conversion fails
✅ Prevents duplicate conversions
✅ Activation blocked if no supported library (GD/Imagick) is found
🚀 Why Use This Plugin?
- Improve Core Web Vitals (LCP, CLS)
- Boost SEO rankings
- Reduce page load time
- Save server storage
- Deliver modern image formats automatically
Requirements
- PHP 7.4 or higher
- PHP GD extension (recommended) or Imagick
Usage
- Upload images normally via Media Library
- Images are automatically converted to WebP
- Customize settings under Tools Pixellize Image Optimizer
- Already converted images are skipped automatically
Roadmap
- Serve WebP everywhere, including page builders and ACF fields, via output rewriting
- CDN URL rewriting (use your own CDN host for images)
- AVIF output alongside WebP
- Lazy loading integration
License
This plugin is licensed under GPL v2 or later.
Author
Pixellize
🌐 https://pixellize.io
Screenshots
